| Evening Independent (Massillon,Ohio) | Newspapers and Periodicals | 5,631,560 |
| Daily Gazette (Xenia,Ohio) | Newspapers and Periodicals | 1,624,179 |
| Miami Helmet, The (Piqua,Ohio) | Newspapers and Periodicals | 202,164 |
| Piqua Daily Call, The (Piqua,Ohio) | Newspapers and Periodicals | 177,587 |
| Euclid High School, Yearbook (Euclid, Ohio) | Yearbooks | 168,160 |
| Piqua Leader-Dispatch, The (Piqua,Ohio) | Newspapers and Periodicals | 149,852 |
| The Official Roster of the Soldiers of the American Revolution Buried in the State of Ohio | Military Records | 121,399 |
| History of Belmont and Jefferson Counties, Ohio | Local and General History | 113,379 |
| Land Patents - Ohio | Land and Property Records | 104,783 |
| History of Knox County, Ohio, Its Past And Present (1881) | Local and General History | 98,248 |
| Marysville Tribune (Marysville,Ohio) | Newspapers and Periodicals | 89,496 |
| History of River Scioto Valley, Ohio | Miscellaneous | 86,289 |
| Massillon Item (Massillon,Ohio) | Newspapers and Periodicals | 83,320 |
| Early Ohio Tax Records: Reprinted with The Index to Early Ohio Tax Records | Government Records | 82,926 |
| History of Northwest Ohio, Volume 3 Updated | Local and General History | 77,537 |
| History of Cuyahoga County, Ohio (1879) | Local and General History | 72,737 |
| Historical Collections of Harrison County, in the State of Ohio, With Lists of the First Land-Owners, Early Marriages -1841, Will Records,-1861 | Land and Property Records | 71,689 |
| Federal Land Series, Volume 4, Grants in the Virginia Military District of Ohio | Land and Property Records | 70,233 |
| Ohio Source Records: from The Ohio Genealogical Quarterly | Local and General History | 69,833 |
| History of Greene County, Ohio; Embracing the Organization of the County, Its Division Into Townships, Sketches of Local Interest Gleaned From the Pioneers From 1803 To 1840 | Military Records | 69,710 |
| History of Coshocton County, Ohio, 1740-1881 (1881) | Local and General History | 66,465 |
| Historical Collections of Harrison County: in the State of Ohio | Local and General History | 65,446 |
| History of Cuyahoga County, Ohio (1881) | Local and General History | 63,297 |
| History of the Fire Lands, Comprising Huron And Erie Counties, Ohio (1879) | Local and General History | 63,050 |
| Ohio Wills and Estates to 1850: An Index | Court and Probate Records | 62,736 |
